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File Types and Extensions

What common file extensions mean and which program or purpose they belong to.

76 cardsGrades 3–5, Grades 6–8, Grades 9–12, Adult#file extensions#formats#computer skills

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  • .txtExtension
    Plain text file
  • .doc / .docxExtension
    Microsoft Word document
  • .pdfExtension
    Portable Document Format, looks the same on any device
  • .rtfExtension
    Rich Text Format, text with simple formatting
  • .odtExtension
    OpenDocument text file
  • .xls / .xlsxExtension
    Microsoft Excel spreadsheet
  • .csvExtension
    Comma-separated values, a simple data table in text
  • .ppt / .pptxExtension
    Microsoft PowerPoint presentation
  • .keyExtension
    Apple Keynote presentation
  • .pagesExtension
    Apple Pages document
  • .jpg / .jpegExtension
    Compressed photo image
  • .pngExtension
    Image with lossless compression and transparency
  • .gifExtension
    Image format that supports simple animation
  • .bmpExtension
    Uncompressed bitmap image
  • .svgExtension
    Scalable vector graphics, sharp at any size
  • .webpExtension
    Modern web image format
  • .heicExtension
    Apple's efficient photo format
  • .tiffExtension
    High-quality image format
  • .psdExtension
    Adobe Photoshop file
  • .aiExtension
    Adobe Illustrator file
  • .mp3Extension
    Compressed audio
  • .wavExtension
    Uncompressed audio
  • .aacExtension
    Compressed audio format used by Apple
  • .flacExtension
    Lossless compressed audio
  • .oggExtension
    Open audio format
  • .midi / .midExtension
    File with music notes instead of sound
  • .mp4Extension
    Common video format
  • .movExtension
    Apple QuickTime video
  • .aviExtension
    Older Microsoft video format
  • .mkvExtension
    Flexible video container format
  • .webmExtension
    Open video format for the web
  • .zipExtension
    Compressed archive of files
  • .rarExtension
    Compressed archive format
  • .7zExtension
    7-Zip compressed archive
  • .tar.gzExtension
    Compressed archive common on Linux
  • .exeExtension
    Windows program
  • .msiExtension
    Windows installer
  • .dmgExtension
    Mac disk image used for installing apps
  • .appExtension
    Mac application
  • .apkExtension
    Android app package
  • .ipaExtension
    iOS app package
  • .isoExtension
    Disk image of a disc
  • .html / .htmExtension
    Web page
  • .cssExtension
    Stylesheet for web pages
  • .jsExtension
    JavaScript code
  • .jsonExtension
    JavaScript Object Notation, a common data format
  • .xmlExtension
    Extensible Markup Language, structured data
  • .pyExtension
    Python code
  • .javaExtension
    Java source code
  • .classExtension
    Compiled Java code
  • .c / .cppExtension
    C and C++ source code
  • .csExtension
    C# source code
  • .phpExtension
    PHP script
  • .rbExtension
    Ruby script
  • .sqlExtension
    SQL database commands
  • .db / .sqliteExtension
    Database file
  • .mdExtension
    Markdown text file
  • .yml / .yamlExtension
    Human-readable configuration data
  • .shExtension
    Shell script
  • .batExtension
    Windows batch file
  • .ini / .cfgExtension
    Configuration file
  • .logExtension
    Log file recording events
  • .tmpExtension
    Temporary file
  • .bakExtension
    Backup file
  • .dllExtension
    Windows dynamic link library
  • .sysExtension
    System file
  • .ttf / .otfExtension
    Font files
  • .epubExtension
    E-book format
  • .icsExtension
    Calendar event file
  • .vcfExtension
    Contact card file
  • .torrentExtension
    File used by peer-to-peer sharing software
  • File extensionExtension
    The letters after the dot that suggest the file type
  • FilenameExtension
    The name before the extension
  • Folder (directory)Extension
    A container for files
  • PathExtension
    The location of a file, such as C:\Users\Sam\file.txt
  • Operating systemExtension
    Software that manages a computer, like Windows, macOS, Linux, Android, iOS

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